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Practical Biomedical Signal Analysis Using MATLAB
book

Practical Biomedical Signal Analysis Using MATLAB

by Katarzyn Blinowska, Jaroslaw Zygierewicz
September 2011
Intermediate to advanced content levelIntermediate to advanced
324 pages
10h 9m
English
CRC Press
Content preview from Practical Biomedical Signal Analysis Using MATLAB
Introductory concepts 11
x(t)=
Z
X( f )e
i2π ft
df (1.26)
X( f )=
Z
x(t)e
i2π ft
dt (1.27)
1.4.3 Finite discrete signal
In practice we deal with discrete signals of nite duration. The Fourier transform
that operates on this kind of signal is called discrete Fourier transform (DFT) and the
algorithms that implement it are FFT (fast Fourier transform).
The DFT formula can be derived from (1.23). The signal to be transformed is
N samples long x = {x[0],...,x[n],...x[N 1]} and the samples are taken every T
s
seconds. It is assumed that the nite signal x is just one period of the innite periodic
sequence with period T = N ·T
s
. The process of sampling can ...
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Publisher Resources

ISBN: 9781439812037